After upgrading from win 98 to win xp, home edition my pc is shuting down and my programs are freezing and not responding. Incidently, i did not uninstall win 98 first.The window responsible for the shutdown is :shutdown fileby NT AUTHORITY\SYSTEMc:\windows\system32\lsass.exe

I also get this: physical memory available to windows is 261,664kb can someone please help?my system is athlon xp 1800+1.4ghz 256mb ramthanks, malttech

XP is much more demanding of system hardware than 98 was. Often the problem is the RAM. Take it out and reseat it for sure. I'd try to borrow another stick and try that.

You can get Memtest86 to test your system at a low level. If Memtest displays errors you can expect XP to blue screen, freeze and/or reboot. Once Memtest runs cleanly the blue screens, etc. should be resolved. If not, then a clean install of XP makes sense.

QUOTE(malttech @ Jan 8 2006, 08:07 AM)Incidently, i did not uninstall win 98 first.Not recommended. For optimum performance and stability, do a clean install of xp after you have wiped the drive. Make sure you have the old 98 cd because xp will ask you for it during the install.

Edit: Make sure you back up everything on the drive that you need to keep before wiping it. Wiping a drive will erase all data in it.

-------------------------There are two kinds of people in the computing world.....those who have lost data, and those who will.If your data is worth anything, back it up!